| // Copyright (c) 2018 Google Inc. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #ifndef SOURCE_OPT_IR_BUILDER_H_ |
| #define SOURCE_OPT_IR_BUILDER_H_ |
| |
| #include <limits> |
| #include <memory> |
| #include <utility> |
| #include <vector> |
| |
| #include "source/opt/basic_block.h" |
| #include "source/opt/constants.h" |
| #include "source/opt/instruction.h" |
| #include "source/opt/ir_context.h" |
| |
| namespace spvtools { |
| namespace opt { |
| |
| // In SPIR-V, ids are encoded as uint16_t, this id is guaranteed to be always |
| // invalid. |
| const uint32_t kInvalidId = std::numeric_limits<uint32_t>::max(); |
| |
| // Helper class to abstract instruction construction and insertion. |
| // The instruction builder can preserve the following analyses (specified via |
| // the constructors): |
| // - Def-use analysis |
| // - Instruction to block analysis |
| class InstructionBuilder { |
| public: |
| using InsertionPointTy = BasicBlock::iterator; |
| |
| // Creates an InstructionBuilder, all new instructions will be inserted before |
| // the instruction |insert_before|. |
| InstructionBuilder( |
| IRContext* context, Instruction* insert_before, |
| IRContext::Analysis preserved_analyses = IRContext::kAnalysisNone) |
| : InstructionBuilder(context, context->get_instr_block(insert_before), |
| InsertionPointTy(insert_before), |
| preserved_analyses) {} |
| |
| // Creates an InstructionBuilder, all new instructions will be inserted at the |
| // end of the basic block |parent_block|. |
| InstructionBuilder( |
| IRContext* context, BasicBlock* parent_block, |
| IRContext::Analysis preserved_analyses = IRContext::kAnalysisNone) |
| : InstructionBuilder(context, parent_block, parent_block->end(), |
| preserved_analyses) {} |
| |
| Instruction* AddNullaryOp(uint32_t type_id, SpvOp opcode) { |
| // TODO(1841): Handle id overflow. |
| std::unique_ptr<Instruction> newUnOp(new Instruction( |
| GetContext(), opcode, type_id, |
| opcode == SpvOpReturn ? 0 : GetContext()->TakeNextId(), {})); |
| return AddInstruction(std::move(newUnOp)); |
| } |
| |
| Instruction* AddUnaryOp(uint32_t type_id, SpvOp opcode, uint32_t operand1) { |
| // TODO(1841): Handle id overflow. |
| std::unique_ptr<Instruction> newUnOp(new Instruction( |
| GetContext(), opcode, type_id, GetContext()->TakeNextId(), |
| {{spv_operand_type_t::SPV_OPERAND_TYPE_ID, {operand1}}})); |
| return AddInstruction(std::move(newUnOp)); |
| } |
| |
| Instruction* AddBinaryOp(uint32_t type_id, SpvOp opcode, uint32_t operand1, |
| uint32_t operand2) { |
| // TODO(1841): Handle id overflow. |
| std::unique_ptr<Instruction> newBinOp(new Instruction( |
| GetContext(), opcode, type_id, |
| opcode == SpvOpStore ? 0 : GetContext()->TakeNextId(), |
| {{spv_operand_type_t::SPV_OPERAND_TYPE_ID, {operand1}}, |
| {spv_operand_type_t::SPV_OPERAND_TYPE_ID, {operand2}}})); |
| return AddInstruction(std::move(newBinOp)); |
| } |
| |
| Instruction* AddTernaryOp(uint32_t type_id, SpvOp opcode, uint32_t operand1, |
| uint32_t operand2, uint32_t operand3) { |
| // TODO(1841): Handle id overflow. |
| std::unique_ptr<Instruction> newTernOp(new Instruction( |
| GetContext(), opcode, type_id, GetContext()->TakeNextId(), |
| {{spv_operand_type_t::SPV_OPERAND_TYPE_ID, {operand1}}, |
| {spv_operand_type_t::SPV_OPERAND_TYPE_ID, {operand2}}, |
| {spv_operand_type_t::SPV_OPERAND_TYPE_ID, {operand3}}})); |
| return AddInstruction(std::move(newTernOp)); |
| } |
| |
| Instruction* AddQuadOp(uint32_t type_id, SpvOp opcode, uint32_t operand1, |
| uint32_t operand2, uint32_t operand3, |
| uint32_t operand4) { |
| // TODO(1841): Handle id overflow. |
| std::unique_ptr<Instruction> newQuadOp(new Instruction( |
| GetContext(), opcode, type_id, GetContext()->TakeNextId(), |
| {{spv_operand_type_t::SPV_OPERAND_TYPE_ID, {operand1}}, |
| {spv_operand_type_t::SPV_OPERAND_TYPE_ID, {operand2}}, |
| {spv_operand_type_t::SPV_OPERAND_TYPE_ID, {operand3}}, |
| {spv_operand_type_t::SPV_OPERAND_TYPE_ID, {operand4}}})); |
| return AddInstruction(std::move(newQuadOp)); |
| } |
| |
| Instruction* AddIdLiteralOp(uint32_t type_id, SpvOp opcode, uint32_t operand1, |
| uint32_t operand2) { |
| // TODO(1841): Handle id overflow. |
| std::unique_ptr<Instruction> newBinOp(new Instruction( |
| GetContext(), opcode, type_id, GetContext()->TakeNextId(), |
| {{spv_operand_type_t::SPV_OPERAND_TYPE_ID, {operand1}}, |
| {spv_operand_type_t::SPV_OPERAND_TYPE_LITERAL_INTEGER, {operand2}}})); |
| return AddInstruction(std::move(newBinOp)); |
| } |
| |
| // Creates an N-ary instruction of |opcode|. |
| // |typid| must be the id of the instruction's type. |
| // |operands| must be a sequence of operand ids. |
| // Use |result| for the result id if non-zero. |
| Instruction* AddNaryOp(uint32_t type_id, SpvOp opcode, |
| const std::vector<uint32_t>& operands, |
| uint32_t result = 0) { |
| std::vector<Operand> ops; |
| for (size_t i = 0; i < operands.size(); i++) { |
| ops.push_back({SPV_OPERAND_TYPE_ID, {operands[i]}}); |
| } |
| // TODO(1841): Handle id overflow. |
| std::unique_ptr<Instruction> new_inst(new Instruction( |
| GetContext(), opcode, type_id, |
| result != 0 ? result : GetContext()->TakeNextId(), ops)); |
| return AddInstruction(std::move(new_inst)); |
| } |
| |
| // Creates a new selection merge instruction. |
| // The id |merge_id| is the merge basic block id. |
| Instruction* AddSelectionMerge( |
| uint32_t merge_id, |
| uint32_t selection_control = SpvSelectionControlMaskNone) { |
| std::unique_ptr<Instruction> new_branch_merge(new Instruction( |
| GetContext(), SpvOpSelectionMerge, 0, 0, |
| {{spv_operand_type_t::SPV_OPERAND_TYPE_ID, {merge_id}}, |
| {spv_operand_type_t::SPV_OPERAND_TYPE_SELECTION_CONTROL, |
| {selection_control}}})); |
| return AddInstruction(std::move(new_branch_merge)); |
| } |
| |
| // Creates a new loop merge instruction. |
| // The id |merge_id| is the basic block id of the merge block. |
| // |continue_id| is the id of the continue block. |
| // |loop_control| are the loop control flags to be added to the instruction. |
| Instruction* AddLoopMerge(uint32_t merge_id, uint32_t continue_id, |
| uint32_t loop_control = SpvLoopControlMaskNone) { |
| std::unique_ptr<Instruction> new_branch_merge(new Instruction( |
| GetContext(), SpvOpLoopMerge, 0, 0, |
| {{spv_operand_type_t::SPV_OPERAND_TYPE_ID, {merge_id}}, |
| {spv_operand_type_t::SPV_OPERAND_TYPE_ID, {continue_id}}, |
| {spv_operand_type_t::SPV_OPERAND_TYPE_LOOP_CONTROL, {loop_control}}})); |
| return AddInstruction(std::move(new_branch_merge)); |
| } |
| |
| // Creates a new branch instruction to |label_id|. |
| // Note that the user must make sure the final basic block is |
| // well formed. |
| Instruction* AddBranch(uint32_t label_id) { |
| std::unique_ptr<Instruction> new_branch(new Instruction( |
| GetContext(), SpvOpBranch, 0, 0, |
| {{spv_operand_type_t::SPV_OPERAND_TYPE_ID, {label_id}}})); |
| return AddInstruction(std::move(new_branch)); |
| } |
| |
| // Creates a new conditional instruction and the associated selection merge |
| // instruction if requested. |
| // The id |cond_id| is the id of the condition instruction, must be of |
| // type bool. |
| // The id |true_id| is the id of the basic block to branch to if the condition |
| // is true. |
| // The id |false_id| is the id of the basic block to branch to if the |
| // condition is false. |
| // The id |merge_id| is the id of the merge basic block for the selection |
| // merge instruction. If |merge_id| equals kInvalidId then no selection merge |
| // instruction will be created. |
| // The value |selection_control| is the selection control flag for the |
| // selection merge instruction. |
| // Note that the user must make sure the final basic block is |
| // well formed. |
| Instruction* AddConditionalBranch( |
| uint32_t cond_id, uint32_t true_id, uint32_t false_id, |
| uint32_t merge_id = kInvalidId, |
| uint32_t selection_control = SpvSelectionControlMaskNone) { |
| if (merge_id != kInvalidId) { |
| AddSelectionMerge(merge_id, selection_control); |
| } |
| std::unique_ptr<Instruction> new_branch(new Instruction( |
| GetContext(), SpvOpBranchConditional, 0, 0, |
| {{spv_operand_type_t::SPV_OPERAND_TYPE_ID, {cond_id}}, |
| {spv_operand_type_t::SPV_OPERAND_TYPE_ID, {true_id}}, |
| {spv_operand_type_t::SPV_OPERAND_TYPE_ID, {false_id}}})); |
| return AddInstruction(std::move(new_branch)); |
| } |
| |
| // Creates a new switch instruction and the associated selection merge |
| // instruction if requested. |
| // The id |selector_id| is the id of the selector instruction, must be of |
| // type int. |
| // The id |default_id| is the id of the default basic block to branch to. |
| // The vector |targets| is the pair of literal/branch id. |
| // The id |merge_id| is the id of the merge basic block for the selection |
| // merge instruction. If |merge_id| equals kInvalidId then no selection merge |
| // instruction will be created. |
| // The value |selection_control| is the selection control flag for the |
| // selection merge instruction. |
| // Note that the user must make sure the final basic block is |
| // well formed. |
| Instruction* AddSwitch( |
| uint32_t selector_id, uint32_t default_id, |
| const std::vector<std::pair<Operand::OperandData, uint32_t>>& targets, |
| uint32_t merge_id = kInvalidId, |
| uint32_t selection_control = SpvSelectionControlMaskNone) { |
| if (merge_id != kInvalidId) { |
| AddSelectionMerge(merge_id, selection_control); |
| } |
| std::vector<Operand> operands; |
| operands.emplace_back( |
| Operand{spv_operand_type_t::SPV_OPERAND_TYPE_ID, {selector_id}}); |
| operands.emplace_back( |
| Operand{spv_operand_type_t::SPV_OPERAND_TYPE_ID, {default_id}}); |
| for (auto& target : targets) { |
| operands.emplace_back( |
| Operand{spv_operand_type_t::SPV_OPERAND_TYPE_TYPED_LITERAL_NUMBER, |
| target.first}); |
| operands.emplace_back( |
| Operand{spv_operand_type_t::SPV_OPERAND_TYPE_ID, {target.second}}); |
| } |
| std::unique_ptr<Instruction> new_switch( |
| new Instruction(GetContext(), SpvOpSwitch, 0, 0, operands)); |
| return AddInstruction(std::move(new_switch)); |
| } |
| |
| // Creates a phi instruction. |
| // The id |type| must be the id of the phi instruction's type. |
| // The vector |incomings| must be a sequence of pairs of <definition id, |
| // parent id>. |
| Instruction* AddPhi(uint32_t type, const std::vector<uint32_t>& incomings, |
| uint32_t result = 0) { |
| assert(incomings.size() % 2 == 0 && "A sequence of pairs is expected"); |
| return AddNaryOp(type, SpvOpPhi, incomings, result); |
| } |
| |
| // Creates an addition instruction. |
| // The id |type| must be the id of the instruction's type, must be the same as |
| // |op1| and |op2| types. |
| // The id |op1| is the left hand side of the operation. |
| // The id |op2| is the right hand side of the operation. |
| Instruction* AddIAdd(uint32_t type, uint32_t op1, uint32_t op2) { |
| // TODO(1841): Handle id overflow. |
| std::unique_ptr<Instruction> inst(new Instruction( |
| GetContext(), SpvOpIAdd, type, GetContext()->TakeNextId(), |
| {{SPV_OPERAND_TYPE_ID, {op1}}, {SPV_OPERAND_TYPE_ID, {op2}}})); |
| return AddInstruction(std::move(inst)); |
| } |
| |
| // Creates a less than instruction for unsigned integer. |
| // The id |op1| is the left hand side of the operation. |
| // The id |op2| is the right hand side of the operation. |
| // It is assumed that |op1| and |op2| have the same underlying type. |
| Instruction* AddULessThan(uint32_t op1, uint32_t op2) { |
| analysis::Bool bool_type; |
| uint32_t type = GetContext()->get_type_mgr()->GetId(&bool_type); |
| // TODO(1841): Handle id overflow. |
| std::unique_ptr<Instruction> inst(new Instruction( |
| GetContext(), SpvOpULessThan, type, GetContext()->TakeNextId(), |
| {{SPV_OPERAND_TYPE_ID, {op1}}, {SPV_OPERAND_TYPE_ID, {op2}}})); |
| return AddInstruction(std::move(inst)); |
| } |
| |
| // Creates a less than instruction for signed integer. |
| // The id |op1| is the left hand side of the operation. |
| // The id |op2| is the right hand side of the operation. |
| // It is assumed that |op1| and |op2| have the same underlying type. |
| Instruction* AddSLessThan(uint32_t op1, uint32_t op2) { |
| analysis::Bool bool_type; |
| uint32_t type = GetContext()->get_type_mgr()->GetId(&bool_type); |
| // TODO(1841): Handle id overflow. |
| std::unique_ptr<Instruction> inst(new Instruction( |
| GetContext(), SpvOpSLessThan, type, GetContext()->TakeNextId(), |
| {{SPV_OPERAND_TYPE_ID, {op1}}, {SPV_OPERAND_TYPE_ID, {op2}}})); |
| return AddInstruction(std::move(inst)); |
| } |
| |
| // Creates an OpILessThan or OpULessThen instruction depending on the sign of |
| // |op1|. The id |op1| is the left hand side of the operation. The id |op2| is |
| // the right hand side of the operation. It is assumed that |op1| and |op2| |
| // have the same underlying type. |
| Instruction* AddLessThan(uint32_t op1, uint32_t op2) { |
| Instruction* op1_insn = context_->get_def_use_mgr()->GetDef(op1); |
| analysis::Type* type = |
| GetContext()->get_type_mgr()->GetType(op1_insn->type_id()); |
| analysis::Integer* int_type = type->AsInteger(); |
| assert(int_type && "Operand is not of int type"); |
| |
| if (int_type->IsSigned()) |
| return AddSLessThan(op1, op2); |
| else |
| return AddULessThan(op1, op2); |
| } |
| |
| // Creates a select instruction. |
| // |type| must match the types of |true_value| and |false_value|. It is up to |
| // the caller to ensure that |cond| is a correct type (bool or vector of |
| // bool) for |type|. |
| Instruction* AddSelect(uint32_t type, uint32_t cond, uint32_t true_value, |
| uint32_t false_value) { |
| // TODO(1841): Handle id overflow. |
| std::unique_ptr<Instruction> select(new Instruction( |
| GetContext(), SpvOpSelect, type, GetContext()->TakeNextId(), |
| std::initializer_list<Operand>{{SPV_OPERAND_TYPE_ID, {cond}}, |
| {SPV_OPERAND_TYPE_ID, {true_value}}, |
| {SPV_OPERAND_TYPE_ID, {false_value}}})); |
| return AddInstruction(std::move(select)); |
| } |
| |
| // Adds a signed int32 constant to the binary. |
| // The |value| parameter is the constant value to be added. |
| Instruction* GetSintConstant(int32_t value) { |
| return GetIntConstant<int32_t>(value, true); |
| } |
| |
| // Create a composite construct. |
| // |type| should be a composite type and the number of elements it has should |
| // match the size od |ids|. |
| Instruction* AddCompositeConstruct(uint32_t type, |
| const std::vector<uint32_t>& ids) { |
| std::vector<Operand> ops; |
| for (auto id : ids) { |
| ops.emplace_back(SPV_OPERAND_TYPE_ID, |
| std::initializer_list<uint32_t>{id}); |
| } |
| // TODO(1841): Handle id overflow. |
| std::unique_ptr<Instruction> construct( |
| new Instruction(GetContext(), SpvOpCompositeConstruct, type, |
| GetContext()->TakeNextId(), ops)); |
| return AddInstruction(std::move(construct)); |
| } |
| // Adds an unsigned int32 constant to the binary. |
| // The |value| parameter is the constant value to be added. |
| Instruction* GetUintConstant(uint32_t value) { |
| return GetIntConstant<uint32_t>(value, false); |
| } |
| |
| uint32_t GetUintConstantId(uint32_t value) { |
| Instruction* uint_inst = GetUintConstant(value); |
| return uint_inst->result_id(); |
| } |
| |
| uint32_t GetNullId(uint32_t type_id) { |
| analysis::TypeManager* type_mgr = GetContext()->get_type_mgr(); |
| analysis::ConstantManager* const_mgr = GetContext()->get_constant_mgr(); |
| const analysis::Type* type = type_mgr->GetType(type_id); |
| const analysis::Constant* null_const = const_mgr->GetConstant(type, {}); |
| Instruction* null_inst = |
| const_mgr->GetDefiningInstruction(null_const, type_id); |
| return null_inst->result_id(); |
| } |
| |
| // Adds either a signed or unsigned 32 bit integer constant to the binary |
| // depedning on the |sign|. If |sign| is true then the value is added as a |
| // signed constant otherwise as an unsigned constant. If |sign| is false the |
| // value must not be a negative number. |
| template <typename T> |
| Instruction* GetIntConstant(T value, bool sign) { |
| // Assert that we are not trying to store a negative number in an unsigned |
| // type. |
| if (!sign) |
| assert(value >= 0 && |
| "Trying to add a signed integer with an unsigned type!"); |
| |
| analysis::Integer int_type{32, sign}; |
| |
| // Get or create the integer type. This rebuilds the type and manages the |
| // memory for the rebuilt type. |
| uint32_t type_id = |
| GetContext()->get_type_mgr()->GetTypeInstruction(&int_type); |
| |
| // Get the memory managed type so that it is safe to be stored by |
| // GetConstant. |
| analysis::Type* rebuilt_type = |
| GetContext()->get_type_mgr()->GetType(type_id); |
| |
| // Even if the value is negative we need to pass the bit pattern as a |
| // uint32_t to GetConstant. |
| uint32_t word = value; |
| |
| // Create the constant value. |
| const analysis::Constant* constant = |
| GetContext()->get_constant_mgr()->GetConstant(rebuilt_type, {word}); |
| |
| // Create the OpConstant instruction using the type and the value. |
| return GetContext()->get_constant_mgr()->GetDefiningInstruction(constant); |
| } |
| |
| Instruction* AddCompositeExtract(uint32_t type, uint32_t id_of_composite, |
| const std::vector<uint32_t>& index_list) { |
| std::vector<Operand> operands; |
| operands.push_back({SPV_OPERAND_TYPE_ID, {id_of_composite}}); |
| |
| for (uint32_t index : index_list) { |
| operands.push_back({SPV_OPERAND_TYPE_LITERAL_INTEGER, {index}}); |
| } |
| |
| // TODO(1841): Handle id overflow. |
| std::unique_ptr<Instruction> new_inst( |
| new Instruction(GetContext(), SpvOpCompositeExtract, type, |
| GetContext()->TakeNextId(), operands)); |
| return AddInstruction(std::move(new_inst)); |
| } |
| |
| // Creates an unreachable instruction. |
| Instruction* AddUnreachable() { |
| std::unique_ptr<Instruction> select( |
| new Instruction(GetContext(), SpvOpUnreachable, 0, 0, |
| std::initializer_list<Operand>{})); |
| return AddInstruction(std::move(select)); |
| } |
| |
| Instruction* AddAccessChain(uint32_t type_id, uint32_t base_ptr_id, |
| std::vector<uint32_t> ids) { |
| std::vector<Operand> operands; |
| operands.push_back({SPV_OPERAND_TYPE_ID, {base_ptr_id}}); |
| |
| for (uint32_t index_id : ids) { |
| operands.push_back({SPV_OPERAND_TYPE_ID, {index_id}}); |
| } |
| |
| // TODO(1841): Handle id overflow. |
| std::unique_ptr<Instruction> new_inst( |
| new Instruction(GetContext(), SpvOpAccessChain, type_id, |
| GetContext()->TakeNextId(), operands)); |
| return AddInstruction(std::move(new_inst)); |
| } |
| |
| Instruction* AddLoad(uint32_t type_id, uint32_t base_ptr_id) { |
| std::vector<Operand> operands; |
| operands.push_back({SPV_OPERAND_TYPE_ID, {base_ptr_id}}); |
| |
| // TODO(1841): Handle id overflow. |
| std::unique_ptr<Instruction> new_inst( |
| new Instruction(GetContext(), SpvOpLoad, type_id, |
| GetContext()->TakeNextId(), operands)); |
| return AddInstruction(std::move(new_inst)); |
| } |
| |
| Instruction* AddStore(uint32_t ptr_id, uint32_t obj_id) { |
| std::vector<Operand> operands; |
| operands.push_back({SPV_OPERAND_TYPE_ID, {ptr_id}}); |
| operands.push_back({SPV_OPERAND_TYPE_ID, {obj_id}}); |
| |
| std::unique_ptr<Instruction> new_inst( |
| new Instruction(GetContext(), SpvOpStore, 0, 0, operands)); |
| return AddInstruction(std::move(new_inst)); |
| } |
| |
| Instruction* AddFunctionCall(uint32_t result_type, uint32_t function, |
| const std::vector<uint32_t>& parameters) { |
| std::vector<Operand> operands; |
| operands.push_back({SPV_OPERAND_TYPE_ID, {function}}); |
| for (uint32_t id : parameters) { |
| operands.push_back({SPV_OPERAND_TYPE_ID, {id}}); |
| } |
| |
| uint32_t result_id = GetContext()->TakeNextId(); |
| if (result_id == 0) { |
| return nullptr; |
| } |
| std::unique_ptr<Instruction> new_inst(new Instruction( |
| GetContext(), SpvOpFunctionCall, result_type, result_id, operands)); |
| return AddInstruction(std::move(new_inst)); |
| } |
| |
| Instruction* AddVectorShuffle(uint32_t result_type, uint32_t vec1, |
| uint32_t vec2, |
| const std::vector<uint32_t>& components) { |
| std::vector<Operand> operands; |
| operands.push_back({SPV_OPERAND_TYPE_ID, {vec1}}); |
| operands.push_back({SPV_OPERAND_TYPE_ID, {vec2}}); |
| for (uint32_t id : components) { |
| operands.push_back({SPV_OPERAND_TYPE_LITERAL_INTEGER, {id}}); |
| } |
| |
| uint32_t result_id = GetContext()->TakeNextId(); |
| if (result_id == 0) { |
| return nullptr; |
| } |
| |
| std::unique_ptr<Instruction> new_inst(new Instruction( |
| GetContext(), SpvOpVectorShuffle, result_type, result_id, operands)); |
| return AddInstruction(std::move(new_inst)); |
| } |
| |
| // Inserts the new instruction before the insertion point. |
| Instruction* AddInstruction(std::unique_ptr<Instruction>&& insn) { |
| Instruction* insn_ptr = &*insert_before_.InsertBefore(std::move(insn)); |
| UpdateInstrToBlockMapping(insn_ptr); |
| UpdateDefUseMgr(insn_ptr); |
| return insn_ptr; |
| } |
| |
| // Returns the insertion point iterator. |
| InsertionPointTy GetInsertPoint() { return insert_before_; } |
| |
| // Change the insertion point to insert before the instruction |
| // |insert_before|. |
| void SetInsertPoint(Instruction* insert_before) { |
| parent_ = context_->get_instr_block(insert_before); |
| insert_before_ = InsertionPointTy(insert_before); |
| } |
| |
| // Change the insertion point to insert at the end of the basic block |
| // |parent_block|. |
| void SetInsertPoint(BasicBlock* parent_block) { |
| parent_ = parent_block; |
| insert_before_ = parent_block->end(); |
| } |
| |
| // Returns the context which instructions are constructed for. |
| IRContext* GetContext() const { return context_; } |
| |
| // Returns the set of preserved analyses. |
| inline IRContext::Analysis GetPreservedAnalysis() const { |
| return preserved_analyses_; |
| } |
| |
| private: |
| InstructionBuilder(IRContext* context, BasicBlock* parent, |
| InsertionPointTy insert_before, |
| IRContext::Analysis preserved_analyses) |
| : context_(context), |
| parent_(parent), |
| insert_before_(insert_before), |
| preserved_analyses_(preserved_analyses) { |
| assert(!(preserved_analyses_ & ~(IRContext::kAnalysisDefUse | |
| IRContext::kAnalysisInstrToBlockMapping))); |
| } |
| |
| // Returns true if the users requested to update |analysis|. |
| inline bool IsAnalysisUpdateRequested(IRContext::Analysis analysis) const { |
| if (!GetContext()->AreAnalysesValid(analysis)) { |
| // Do not try to update something that is not built. |
| return false; |
| } |
| return preserved_analyses_ & analysis; |
| } |
| |
| // Updates the def/use manager if the user requested it. If he did not request |
| // an update, this function does nothing. |
| inline void UpdateDefUseMgr(Instruction* insn) { |
| if (IsAnalysisUpdateRequested(IRContext::kAnalysisDefUse)) |
| GetContext()->get_def_use_mgr()->AnalyzeInstDefUse(insn); |
| } |
| |
| // Updates the instruction to block analysis if the user requested it. If he |
| // did not request an update, this function does nothing. |
| inline void UpdateInstrToBlockMapping(Instruction* insn) { |
| if (IsAnalysisUpdateRequested(IRContext::kAnalysisInstrToBlockMapping) && |
| parent_) |
| GetContext()->set_instr_block(insn, parent_); |
| } |
| |
| IRContext* context_; |
| BasicBlock* parent_; |
| InsertionPointTy insert_before_; |
| const IRContext::Analysis preserved_analyses_; |
| }; |
| |
| } // namespace opt |
| } // namespace spvtools |
| |
| #endif // SOURCE_OPT_IR_BUILDER_H_ |
